A foreign national who has an offer of permanent employment in the U.S. can be sponsored by their employer, who must follow a multi-step process to help their employee immigrate to the U.S. Applicants are granted visa numbers based upon four categories of employment.:
1. Priority Workers- This category includes foreign nationals who have extraordinary ability in science, the arts, education, athletics, or business. This also includes foreign nationals who are being internationally transferred by their employer.
2. Advanced Degree Professionals- This category includes foreign nationals who have a Masters, Doctorate, or other professional degree. This also includes doctors who will practice medicine in an underserved part of the U.S.
3. Skilled/ Professional Workers- This category includes foreign nationals who have bachelor's degrees, or those who are skilled or unskilled workers.
4. Special Immigrant Workers- This category includes religious workers, and employees, or formal employees of the U.S. government.